<template>
    <div class="app-header-sticky" :class='{show:y>=78}'>
    <div class="container" v-show="y>=78">
    <RouterLink class="logo" to="/"/>
    <AppHeaderNav/>
    <div class="right">
    <RouterLink to="/">品牌</RouterLink>
    <RouterLink to="/">专题</RouterLink>
    </div>
    </div>
    </div>
</template>
<script>
// import { onMounted } from '@vue'
import {useWindowScroll} from '@vueuse/core'
    import AppHeaderNav from './app-header-var.vue'
    // import {ref} from 'vue'

    export default{
        name:'AppHeaderSticky',
        components:{
            AppHeaderNav
        },
        // 弹出效果
        setup(){
            const {y}=useWindowScroll()
            return {y}
        }
        // setup(){
        //     // 记录为y轴选区高度
        //     const y=ref(0)
        //     // 当你页面滚动的时候更新她
        //     onMounted(()=>{
        //         window.onscroll=()=>{
        //             const scrollTop=document.documentElement.scrollTop
        //             console.log(scrollTop)
        //             y.value=scrollTop
        //         }
        //     })
        //     // 供给模板
        //      return { y }
        // }
    }
</script>
<style lang="less" scoped>
.app-header-sticky{
    width:100%;
    height: 80px;
    position: fixed;
    left: 0;
    top:0;
    z-index: 999;
    background-color: #fff;
    border-bottom: 1px solid #e4e4e4;
    transform: translateY(-100%);
    opacity: 0;
    &.show{
        transition: all 0.3s linear;
        transform:none;
        opacity: 1;
    }
    .container{
        display:flex;
        align-items: center;
    }
  .logo {
    width: 200px;
    height: 80px;
    background: url(../assets/images/logo.png) no-repeat  right 2px;
    background-size: 160px auto;
  }
}
.right {
    width: 220px;
    display: flex;
    text-align: center;
    padding-left: 40px;
    border-left: 2px solid @xtxColor;
    a {
      width: 38px;
      margin-right: 40px;
      font-size: 16px;
      line-height: 1;
      &:hover {
        color: @xtxColor;
      }
    }
  }

</style>
